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110 DEVOTED TO EVERYTHING AND EVERY -INTEREST CONNECTED OR ASSO- | CIATED WITH MARINE MATTERS -- ON THE FACE OF. ae EARTH. . Published 4 acy by The Penton. 'Publishing ( Co. one long: as: 'steam remains the motive pow- 'er, but there is decided room' for im- "provement, ever 'inthe existing steam 'CLEVELAND. BUFFALO.. 932° 'CHICAGO. ee sue ue 1328 Monadnock. Bik. : CINCINNATI. zee National ~Bank Bldg. NEW YORK.. 2 pe, West, Street. Bldg. PITTSBURG.. Mee 510° | Park. ° Bidg:. SEATTLE 302, Pioneer Bldg. Correspondence. 'on. Y Mdrine, Cauginecring," Ship Building 'and. Shipping" ees Solicited. and Mexico, $1.00 per Foreign, $2.00. 10: cents: over Subscription, U. S.. annum. Canada, $1.50. Single copies, U. S. and Mexico, Elsewhere, 15 cents. Back numbers three months, 25 cents. i Change of advertising cone ees reach this office on or before -the- first of each month. The Ciera. News Co. aed supply the trade - -~ with the Marine' Review through the regular channels of the - American News Co. European geht The International News (Company, "Breams Building, Chancery Lane; . iG,. oe London, 3. Entered at hee Post. Office. oe Pcleseiand Ohio, as" scone 'Class Matter. . : May; "1909, , POSSIBILITIES OF IMPROVE- MENT. IN AUXILIARY | MACHINERY. The. ober . on in another column "Electrical Installations Aboard Ship," ; which is necessarily somewhat : abridged, is based. upon European' practice and . refers more particularly to. a passen- ger and freight steamship for ocean service. sion in conduit systems referred to is not, therefore, met with in fresh water service, such as the large steamships on the great lakes, where this system A ref- erence is also made tto a single wire is very extensively employed. system using the ship herself as a return circuit, which does not find a place in United States (practice. The principal feature of the paper, 'however, is its treatment of the sub- ject of electrically-operated auxiliaries. 'In previous issues of the Marine Re- view this with has been very: fully dealt in connection' with the \ subject problems have been worked | out. tus. will: stiecessfully Ellicott 'Soare: che' looks «trouble. noyances and 'difficulties The consequent rapid corro-., TAE Marine REVIEW > of gas power aboard ship and the very carefully There can be no doubt whatever. that, so far as economy of "S operation alone is concerned, the lec- trical installation is far in. advance of ~ vithe ordinary steam equipment, but. the - latter' is: so. thoroughly reliable and so ae familiar: fo. all hands that ith; is. doubt- oe ful if the. 'electrically- operated appara-_ it so" that of steam winches of -correspond- supplant apparatus." For example, in the pump- ing system. The ordinary reciprocat- ing pump, as commonly used, is well 'be the extravagant type of steam: motor in-use: Tbe. re, known to most cent development in turbo-pumps in single and multiple . stages makes it possible 'to handle water with com- paratively high efficiency up to pres- sures. rather in excess of any now used afloat, and it is rather. singular that boiler | feeding, fire setvice, and similar "they have. not made way for work, The direct-acting reciprocating pump-~ has been a good servant, and is familiar to every engineer, for, and generally' finds, With the turbo-pump, speed 'regulation of the pump 'itself is not at all neecsary, the only valve that it is necessary to manipulate being the feed regulating valve at the boiler, or the hose valve on the 'fire line; as the case may be, ser of valves, "springs, studs and seats in the pump removes, many of the: an- of ordinary practice. 'Even non- 'condensing, turbo- pumps can be operated at a steam cost-.of one-third 'to one-half that of standatd 'forms of reciprocating 'pumps and the saving in space igs almost 'or quite as great. The objections urged against . electrically-driven windlasses and capstans have been carefully and thoroughly considered and overcome without the introduction of the friction clutches and special circuit breakers suggested and electric capstans are now in common. use. As to electrically-operated steering gears, it may 'be noted that they have 'been in successful operation in the Waited States ing capacity, but. it . is also one. of the first places where: nd the entire absence. May, 1909 since 1893, ann a might mention the steamship Minha: sota of the Great Northern Railway's Trans- Pacific line as an instance. The gear, employed. ain "this case is de- scribed elsewhere in this issue. Elec- tric winches. are also used: successfully "and quite "extensively for: an. infinite variety of services, _ including "that aboard . ship, and, while | ott. 1a true that their cost 'is considerably" higher than the economy: oof their use does not admit of argument. The reference to the propulsion of ships by electricity, calls 'to. -mind that at least three "such installations have ibeen already made, and on this subject we shall have more to say later. In con- clusion, it may be added that the fig- ures given for the proposed installa- tion evidently contemplate a ship of about 6,000 I. H. P., and the estimate is certainly liberal, though it is some- what singular that the author gives no consideration to the use of tur- bine driven generators, a service to which the steam turbine is peculiarly it furnishes one of adapted; in fact. the strongest: of arguments in support of electrically' operated auxiliaries. _ COMPARISONS OF LAKE AND _ OCEAN ENGINES. -- In a paper entitled "Some Points in Connection. With Shipbuilding on the Great Lakes, U. S, A,» present- ed at the April meeting of the Insti- tution of Naval Architects (Great Britain) 'by Prof. H..G. Sadler, of. the University of. Michigan, the author briefly and very. accurate'y describes the leading features of what has be- bulk In re- come a distinctive type--the freighter of the great lakes. gard to the propelling machinery, Ne says: stereo- "To one accustomed to the typed marine ce ta'n features Freighter' further con- most of th? engine Of. that of the 'Lake unorthodox, will but tha' appear sideration will show departures are based upon sound reasoning and also ufoi the some- what different set of cond'tions in- volved. "The main difference may be trace- able to two causes, frst the vessels